the vatican must move or in ward when many believe the religion to be in crisis. here is cbs news correspondent allen pizzey reporting from rome. >> reporter: with his brief announcement in latin, benedict set a modern peres sent that ensures his successor cans take the same path. as one cardinal put it-- he broke a taboo. catholics around the world reacted with surprise, some sadness but overall there was a sense that benedict had done the right thing for himself and the church. >> it's quite an act of humility for the pope to realize he can no longer physically and mentally discharge the duties of his author. >> even as benedict's legacy is being debated, the struggle for succession has begun behind the scenes. latin americans feel their time has come and there are several strong candidates, including cardinal leonardo sandri of argentina. the region is home to 42% of the world's catholics and the church needs a bulwark against gains made by evangelical christians. africa has the fastest-growing catholic population. ghaian cardinal peter turkson, who's only 64,